Attempt to change http-echo image (#10206)

changelog/v1.17.15/change-echo-server-image.yaml

@@ -0,0 +1,9 @@
+changelog:
+- type: NON_USER_FACING
+  description: >-
+    Change the image used in our kubernetes/e2e tests from kennship/http-echo
+    to jmalloc/echo-server. This image supports http/2. It is also smaller and
+    faster, which may speed up our e2e tests and reduce CI costs.
+    kennship/http-echo is also an archived project that appears to not have
+    been updated in 6 years.
+

test/kubernetes/e2e/defaults/testdata/http_echo.yaml

@@ -14,6 +14,7 @@ spec:
     app.kubernetes.io/name: http-echo
   ports:
     - protocol: TCP
+      targetPort: 8080
       port: 3000
 ---
 apiVersion: v1
@@ -26,9 +27,10 @@ metadata:
 spec:
   containers:
   - name: http-echo
-    image: kennship/http-echo@sha256:144322e8e96be2be6675dcf6e3ee15697c5d052d14d240e8914871a2a83990af
+    # we avoid using checksums so that we automatically select amd64 or arm64
+    image: jmalloc/echo-server@v0.3.7
     ports:
-      - containerPort: 3000
+      - containerPort: 8080
     resources:
       requests:
         cpu: "100m"